GM Service Manual Online
For 1990-2009 cars only

Step

Action

Value(s)

Yes

No

1

Was the Instrument Cluster Diagnostic System Check performed?

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Go to Step 2

Go to Diagnostic System Check - Instrument Cluster

2

Was the PCM Diagnostic System Check performed?

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Go to Step 3

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 2.5L (LB8) and 3.0L (L46)

3

  1. Install a scan tool.
  2. Turn the ignition switch to the RUN position.
  3. Establish communication with the instrument cluster.
  4. WOW the instrument cluster ON.

Is the low fuel indicator lamp illuminated?

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Go to Step 4

Go to Step 5

4

  1. Using a scan tool.
  2. Turn the ignition switch to the RUN position.
  3. Observe the low fuel indicator lamp input.

Does the low fuel lamp read on with ¼ tank or less of fuel and the fuel indicator inoperative?

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Go to Step 5

Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 2.5L (LB8) and 3.0L (L46)

5

Replace the instrument cluster. Refer to Instrument Cluster Replacement .

Is the repair complete?

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Go to Diagnostic System Check - Instrument Cluster

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